2 Answers
2

StackGuru is a Jabber/XMPP bot which
gives you a command line interface to
Stackapps sites, including
Stackoverflow, Serverfault and
Superuser. The bot allows you to
follow questions tags by giving you a
notification each time a new question
is ask on the followed tag. You can
also follow a question which will send
you a notification each time someone
post a comment or an answer on the
question.

@George - I highly recommend linking in comments as well (i.e. Stack2RSS): despite doing it manually is a bit cumbersome, and even usability/convenience for the readers aside, the link building and visibility effects within one SE site are specifically worth it, see block Linked within ride sidebar (guess you are aware of it, just a reminder for promotional purposes ;)
–
Steffen OpelOct 6 '10 at 10:20